Have file updates trigger RSS changes and Subscription actions.

[ChrisJohnNOAA]

Description

Dataset updates triggered by file changes using the watch system did not trigger RSS or subscriptions. This is counter to user expectations. The stated reasoning in a code comment was to avoid spammy changes for datasets that change frequently. I also did not see an explanation for users about this behavior. So this change is bringing the RSS and subscription systems in line with both the documentation and user expectations.

I recognize that this changes behavior in a way that could cause excessive notifications and/or load. There is a new parameter "updateSubsRssOnFileChanges" that will allow admins to disable this behavior if needed.

Documentation will be added once the big documentation update is settled.

Fixes #237

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• This change requires a documentation update

Checklist before requesting a review

• I have performed a self-review of my code
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes